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20 June 2017

Delonix regia in full bloom

A large specimen of Delonix regia which can be seen in Frishman Street.
Throughout Tel Aviv the streetscape is ablaze with colour thanks to the gorgeous Delonix regia otherwise known as Royal poinciana.  In Israel, this tree is in flower during the months of May and June.  Its colour is so striking and vibrant and really adds value and interest and makes walking in the street particularly at this time of the year so pleasurable. As well, it also provides habitat for wildlife.



Delonix regia with Igael Tumarkin's Holocaust and Revival sculpture in the background.

Delonix regia is a species of flowering plant in the bean family Fabaceae, subfamily Caesalpinioideae. It is noted for its fern-like leaves and flamboyant display of flowers. In many tropical parts of the world it is grown as an ornamental tree and in English it is given the name royal poinciana or flamboyant. It is also one of several trees known as "flame tree". Delonix regia is endemic to the Madagascar's deciduous forests but has been introduced into tropical and sub-tropical regions worldwide. In the wild it is endangered, but it is widely cultivated elsewhere.  The royal poinciana requires a tropical or near-tropical climate, but can tolerate drought and salty conditions. It prefers an open, free-draining sandy or loamy soil enriched with organic matter. The tree does not like heavy or clay soils and flowers more profusely when kept slightly dry.


In addition to its ornamental value, it is also a useful shade tree in tropical conditions, because it usually grows to a modest height (mostly 5 meters, but it can reach an maximum height of 12 meters) but spreads widely, and its dense foliage provides full shade. In areas with a marked dry season, it sheds its leaves during the drought, but in other areas it is virtually evergreen.

Propogation:  The royal poinciana is most commonly propagated by seeds. Seeds are collected, soaked in warm water for at least 24 hours, and planted in warm, moist soil in a semi-shaded, sheltered position. In lieu of soaking, the seeds can also be 'nicked' or 'pinched' (with a small scissors or nail clipper) and planted immediately. These two methods allow moisture to penetrate the tough outer casing, stimulating germination. The seedlings grow rapidly and can reach 30 cm in a few weeks under ideal conditions.  Less common, but just as effective, is propagation by semi-hardwood cuttings. Branches consisting of the current or last season's growth can be cut into 30 cm sections and planted in a moist potting mixture. This method is slower than seed propagation (cuttings take a few months to root) but is the preferred method for ensuring new trees are true to form. As such, cuttings are a particularly common method of propagation for the rarer yellow-flowering variety of the tree. 
https://en.wikipedia.org/wiki/Delonix_regia


Delonix regia adorning Rothschild Street in central Tel Aviv.
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